Finding the Third Proportional to 394,573.50 and 869,580

Step by Step Solution

1. Step 1: Write the proportion equation
   394,573.50 : 869,580 = 869,580 : x
2. Step 2: Convert to fraction form
   394,573.50/869,580 = 869,580/x
3. Step 3: Cross multiply
   394,573.50x = 869,580 × 869,580
4. Step 4: Simplify right side
   394,573.50x = 756,169,376,400
5. Step 5: Solve for x
   x = 756,169,376,400/394,573.50
6. Step 6: Final answer
   x = 1,916,422.10